[docs] [issue34764] Improve documentation example for using iter() with sentinel value

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:


New changeset 00a48d57dfd52a968b357d68f63c51db3a451566 by Raymond Hettinger (Miss Islington (bot)) in branch '3.7':
bpo-34764: improve docs example of iter() with sentinel value (GH-11222) (#11301)
https://github.com/python/cpython/commit/00a48d57dfd52a968b357d68f63c51db3a451566


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